Lapierre Xelius EFI 400 CP vs DB: The 2015 Gearing Difference
Lapierre Xelius EFI 400 CP vs DB is principally an original gearing question. A used listing may omit the suffix or retain it after components have changed. The 2015 specification gives a clear starting point: compare the actual tooth counts, not just the model name or the number of chainrings.
Read the Lapierre Xelius EFI 400 CP vs DB columns
The 2015 Lapierre catalogue, PDF page 105, places the two EFI 400 variants side by side. Both use an eleven-speed Ultegra rear derailleur, but the chainrings and cassette differ. Keep the CP and DB columns separate when copying figures from this wide table.
| Original variant | Chainrings | Cassette |
|---|---|---|
| EFI 400 CP | 50 / 34 teeth | 11–28 teeth |
| EFI 400 DB | 53 / 39 teeth | 12–25 teeth |
For a prospective purchase, ask for readable chainring markings and cassette identification. Counting rear sprockets alone cannot distinguish these original ranges. An updated crank or cassette can make today's gearing different from the factory suffix without changing the underlying frame.
Use ratios to understand the difference
Dividing the chainring tooth count by the selected rear sprocket gives a simple mechanical ratio. The CP's lowest listed combination is 34 ÷ 28, approximately 1.21; the DB's is 39 ÷ 25, or 1.56. The lower CP number means less wheel rotation for each crank revolution in that combination, before considering any difference in the fitted wheel and tyre.
The highest combinations are 50 ÷ 11, approximately 4.55, and 53 ÷ 12, approximately 4.42. This illustrates why a larger outer chainring alone does not establish the highest overall ratio. These are calculations from catalogue tooth counts, not measured speed, climbing performance or a promise about a rider's ability.
Check the bicycle rather than planning an automatic conversion
Write down what is fitted first, then decide whether the available range suits your familiar routes and riding needs. If it does not, ask a qualified mechanic to assess the complete drivetrain before buying replacement parts. The original table does not establish clearance, derailleur capacity or compatibility for an arbitrary new combination.
Use the EFI 400 original-build checklist for the rest of the equipment, rather than expecting the gearing suffix to identify every component. More period references are available in the Lapierre section.
FAQ: CP and DB interpretation
Does the CP have fewer rear gears?
No. Both EFI 400 columns in this edition list eleven-speed rear equipment; the original tooth ranges are different.
Does a 53-tooth ring always give a higher top gear?
No. The rear sprocket also matters, as the original 53/12 and 50/11 calculations demonstrate.
Can the suffix prove the fitted cassette today?
No. Lapierre Xelius EFI 400 CP vs DB describes the original catalogue configurations; inspect the actual used bicycle for subsequent changes.